.\"	$NetBSD: prop_object.3,v 1.7 2008/04/30 13:10:46 martin Exp $
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.\" Copyright (c) 2006 The NetBSD Foundation, Inc.
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.\" This code is derived from software contributed to The NetBSD Foundation
.\" by Jason R. Thorpe.
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.Dd August 21, 2006
.Dt PROP_OBJECT 3
.Os
.Sh NAME
.Nm prop_object ,
.Nm prop_object_retain ,
.Nm prop_object_release ,
.Nm prop_object_type ,
.Nm prop_object_equals ,
.Nm prop_object_iterator_next ,
.Nm prop_object_iterator_reset ,
.Nm prop_object_iterator_release
.Nd general property container object functions
.Sh LIBRARY
.Lb libprop
.Sh SYNOPSIS
.In prop/proplib.h
.\"
.Ft void
.Fn prop_object_retain "prop_object_t obj"
.Ft void
.Fn prop_object_release "prop_object_t obj"
.\"
.Ft prop_type_t
.Fn prop_object_type "prop_object_t obj"
.Ft bool
.Fn prop_object_equals "prop_object_t obj1" "prop_object_t obj2"
.\"
.Ft prop_object_t
.Fn prop_object_iterator_next "prop_object_iterator_t iter"
.Ft void
.Fn prop_object_iterator_reset "prop_object_iterator_t iter"
.Ft void
.Fn prop_object_iterator_release "prop_object_iterator_t iter"
.Sh DESCRIPTION
The
.Nm prop_object
family of functions operate on all property container object types.
.Bl -tag -width ""
.It Fn prop_object_retain "prop_object_t obj"
Increment the reference count on an object.
.It Fn prop_object_release "prop_object_t obj"
Decrement the reference count on an object.
If the last reference is dropped, the object is freed.
.It Fn prop_object_type "prop_object_t obj"
Determine the type of the object.  Objects are one of the following types:
.Pp
.Bl -tag -width "PROP_TYPE_DICT_KEYSYM" -compact
.It Dv PROP_TYPE_BOOL
Boolean value
.Pq prop_bool_t
.It Dv PROP_TYPE_NUMBER
Number
.Pq prop_number_t
.It Dv PROP_TYPE_STRING
String
.Pq prop_string_t
.It Dv PROP_TYPE_DATA
Opaque data
.Pq prop_data_t
.It Dv PROP_TYPE_ARRAY
Array
.Pq prop_array_t
.It Dv PROP_TYPE_DICTIONARY
Dictionary
.Pq prop_dictionary_t
.It Dv PROP_TYPE_DICT_KEYSYM
Dictionary key symbol
.Pq prop_dictionary_keysym_t
.El
.Pp
If
.Fa obj
is
.Dv NULL ,
then
.Dv PROP_TYPE_UNKNOWN
is returned.
.It Fn prop_object_equals "prop_object_t obj1" "prop_object_t obj2"
Returns
.Dv true
if the two objects are of the same type and are equivalent.
.It Fn prop_object_iterator_next "prop_object_iterator_t iter"
Return the next object in the collection
.Pq array or dictionary
being iterated by the iterator
.Fa iter .
If there are no more objects in the collection,
.Dv NULL
is returned.
.It Fn prop_object_iterator_reset "prop_object_iterator_t iter"
Reset the iterator to the first object in the collection being iterated
by the iterator
.Fa iter .
.It Fn prop_object_iterator_release "prop_object_iterator_t iter"
Release the iterator
.Fa iter .
.El
.Sh SEE ALSO
.Xr prop_array 3 ,
.Xr prop_bool 3 ,
.Xr prop_data 3 ,
.Xr prop_dictionary 3 ,
.Xr prop_number 3 ,
.Xr prop_string 3 ,
.Xr proplib 3
.Sh HISTORY
The
.Nm proplib
property container object library first appeared in
.Nx 4.0 .
